Quake!

This ports id Software's Quake to run on the SDL plugin runtime. The
source code originated from id under the GPLv2 license. I used
https://github.com/ahefner/sdlquake as the base of my port.

Performance is, unsurprisingly, not on par with what you're probably
used to on PC. I average about 10FPS on ipod6g, but it's still
playable.

Sound works well enough, but in-game music is not supported. I've
written ARM assembly routines for the inner sound loop. Make sure you
turn the "brightness" all the way down, or colors will look funky.

To run, extract Quake's data files to /.rockbox/quake. Have fun!

Change-Id: I4285036e967d7f0722802d43cf2096c808ca5799

1 files changed, 151 insertions, 0 deletions

diff --git a/apps/plugins/sdl/progs/quake/asm_draw.h b/apps/plugins/sdl/progs/quake/asm_draw.h
new file mode 100644
index 0000000000..5534ab63c7
--- /dev/null
+++ b/apps/plugins/sdl/progs/quake/asm_draw.h
@@ -0,0 +1,151 @@
+/*
+Copyright (C) 1996-1997 Id Software, Inc.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
+
+See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+//
+// asm_draw.h
+//
+// Include file for asm drawing routines.
+//
+
+//
+// !!! note that this file must match the corresponding C structures at all
+// times !!!
+//
+
+// !!! if this is changed, it must be changed in r_local.h too !!!
+#define NEAR_CLIP       0.01
+
+// !!! if this is changed, it must be changed in r_local.h too !!!
+#define CYCLE   128
+
+// espan_t structure
+// !!! if this is changed, it must be changed in r_shared.h too !!!
+#define espan_t_u       0
+#define espan_t_v           4
+#define espan_t_count   8
+#define espan_t_pnext   12
+#define espan_t_size    16
+
+// sspan_t structure
+// !!! if this is changed, it must be changed in d_local.h too !!!
+#define sspan_t_u       0
+#define sspan_t_v           4
+#define sspan_t_count   8
+#define sspan_t_size    12
+
+// spanpackage_t structure
+// !!! if this is changed, it must be changed in d_polyset.c too !!!
+#define spanpackage_t_pdest                             0
+#define spanpackage_t_pz                                4
+#define spanpackage_t_count                             8
+#define spanpackage_t_ptex                              12
+#define spanpackage_t_sfrac                             16
+#define spanpackage_t_tfrac                             20
+#define spanpackage_t_light                             24
+#define spanpackage_t_zi                                28
+#define spanpackage_t_size                              32 
+
+// edge_t structure
+// !!! if this is changed, it must be changed in r_shared.h too !!!
+#define et_u                    0
+#define et_u_step               4
+#define et_prev                 8
+#define et_next                 12
+#define et_surfs                16
+#define et_nextremove   20
+#define et_nearzi               24
+#define et_owner                28
+#define et_size                 32
+
+// surf_t structure
+// !!! if this is changed, it must be changed in r_shared.h too !!!
+#define SURF_T_SHIFT    6
+#define st_next                 0
+#define st_prev                 4
+#define st_spans                8
+#define st_key                  12
+#define st_last_u               16
+#define st_spanstate    20
+#define st_flags                24
+#define st_data                 28
+#define st_entity               32
+#define st_nearzi               36
+#define st_insubmodel   40
+#define st_d_ziorigin   44
+#define st_d_zistepu    48
+#define st_d_zistepv    52
+#define st_pad                  56
+#define st_size                 64
+
+// clipplane_t structure
+// !!! if this is changed, it must be changed in r_local.h too !!!
+#define cp_normal               0
+#define cp_dist                 12
+#define cp_next                 16
+#define cp_leftedge             20
+#define cp_rightedge    21
+#define cp_reserved             22
+#define cp_size                 24
+
+// medge_t structure
+// !!! if this is changed, it must be changed in model.h too !!!
+#define me_v                            0
+#define me_cachededgeoffset     4
+#define me_size                         8
+
+// mvertex_t structure
+// !!! if this is changed, it must be changed in model.h too !!!
+#define mv_position             0
+#define mv_size                 12
+
+// refdef_t structure
+// !!! if this is changed, it must be changed in render.h too !!!
+#define rd_vrect                                        0
+#define rd_aliasvrect                           20
+#define rd_vrectright                           40
+#define rd_vrectbottom                          44
+#define rd_aliasvrectright                      48
+#define rd_aliasvrectbottom                     52
+#define rd_vrectrightedge                       56
+#define rd_fvrectx                                      60
+#define rd_fvrecty                                      64
+#define rd_fvrectx_adj                          68
+#define rd_fvrecty_adj                          72
+#define rd_vrect_x_adj_shift20          76
+#define rd_vrectright_adj_shift20       80
+#define rd_fvrectright_adj                      84
+#define rd_fvrectbottom_adj                     88
+#define rd_fvrectright                          92
+#define rd_fvrectbottom                         96
+#define rd_horizontalFieldOfView        100
+#define rd_xOrigin                                      104
+#define rd_yOrigin                                      108
+#define rd_vieworg                                      112
+#define rd_viewangles                           124
+#define rd_ambientlight                         136
+#define rd_size                                         140
+
+// mtriangle_t structure
+// !!! if this is changed, it must be changed in model.h too !!!
+#define mtri_facesfront         0
+#define mtri_vertindex          4
+#define mtri_size                       16      // !!! if this changes, array indexing in !!!
+                                                                // !!! d_polysa.s must be changed to match !!!
+#define mtri_shift                      4
+